Monsters of the Multiverse combines two book's worth of stat blocks from Volo's & Tome of Foes. You do lose a lot of lore, but that's only important if you want "deep lore" rather than making your own.
It's possibly worth noting that the lore that's missing from MotM is stuff that has largely been deprecated by WotC - that's one the reasons they've reissued the monsters in the new books. (That's a bit less true of "Tome of Foes" than "Volo's Guide", but only a bit less.) So if you have an interest in staying 'current', there's another reason to go for MotM.